State Deployment in Fog Computing

The geographical distance between mobile devices and application servers (typically hosted in cloud datacenters) penalizes mobile distributed applications with an unavoidable latency and jitter that impacts the performance of distributed applications. Fog Computing architectures mitigate this impact by deploying fragments of state and computing power on surrogate servers at the network edge. However, the performance of Fog Computing depends of a middleware service able to monitor the application and deploy each fragment at the most convenient surrogate. This paper investigates and compares different algorithms to manage state deployment in run-time. Evaluation using a realistic dataset shows that different strategies contribute to increase the performance for distributed applications with distinct data access patterns.